GregBuchholz

"If a comma appears followed without intervening whitespace by a commercial at-sign (@), then it is an error if the following expression does not evaluate to a list;"

Comment · 2 months ago

How do you get that to work?

  #lang racket
  (read-syntax-accept-graph #t)
  (let ((a '#0=(0 . #0#)))
    (display (car a)))

...which of course doesn't work, because `(read-syntax-accept-graph)` is a run-time thing, and the circular-list structure is a `read`-time thing.

I couldn't figure it out with this either:

https://stackoverflow.com/questions/51942188/read-syntax-for...

...just to make sure I wasn't going crazy, this:

  (let ((a '#0=(0 . #0#)))
    (display (car a)))

...does work as expected with this online scheme interpreter:

https://www.jdoodle.com/execute-scheme-online

Comment · 2 months ago

Is Prolog bicameral? Because it has a `read` predicate? Is bicameral then just a matter of implementing a `read` function which returns a tree of tokens, which you could implement for C or Python? Which makes bicamerality a property of a library rather than a property of the language?

Comment · 2 months ago

I tried:

  #lang racket/base
  (let ((a '#0=(0 . #0#)))
    (display (car a)))

...over at

https://onecompiler.com/racket

...and it didn't compile, complaining:

  read-syntax: `#...=` forms not  enabled for `read-syntax` mode

...maybe there is a switch needed to enable it?

Comment · 2 months ago

It looks like Racket nerfed the shared-structure / "Datum Labels" for circular lists and the like (I see it is still in section 2.4 of r7rs):

  '#0=(0 . #0#)

...and I should have included `#|block comments|#`, datum `#;comments`, and probably `|symbols with spaces|`.

  (let ((|1 + 2| (+ 1 2)))
    (display |1 + 2|))

Comment · 2 months ago

Also, CRUNCH from Chicken Scheme:

https://wiki.call-cc.org/eggref/6/crunch

Comment · 2 months ago

Windows has allowed forward slashes for directory separators for a long time. Seems like maybe it started with DOS 2.0.

https://en.wikipedia.org/wiki/Backslash#Filenames

Comment · 2 months ago

> no special syntax for anything.

    (list '(1. . #\#)
          -5/6+7.s-8i
          `(1 ,@2)
          1@1           ;hmmm, no unquote splicing comma ;-)
          10#           ;surprised?
          (list #i+1 +1i 1+i) ;complicated or complex?
          #e-1e10i     ;Old MacDonald?
          "(* 9 10)" #())

Comment · 4 years ago

Looks like DDG gets it right (very first link).

https://duckduckgo.com/?q=realsense+"failed+to+recconect"

Comment · 4 years ago

Here are some of the things I use to increase the range of programs for which I can use vi keybindings:

* vscodevim extension for Vscode

* "set -o vi" in Bash

* Vim Vixen plugin for Firefox

* you can use ctrl-alt-j in gdb. And that might (should?) work in other programs which use GNU Readline to get vi keybindings. The only thing I miss with the vi bindings in bash/readline is "ge/gE" from vim (move backwards to the end of the word).